As I mentioned earlier, administering subcutaneous fluids to chickens can be a supportive measure for certain health issues and can improve hydration in sick chickens. However, it is essential to seek veterinary advice and guidance on the appropriate dosage and frequency of fluid administration for your sick hen.
If your sick hen is not drinking on her own, you can try offering her water mixed with electrolytes or minerals, which can help rehydrate her. You can also try offering her wet or moistened food to increase her water intake. It is essential to provide your sick hen with a clean and comfortable environment, away from predators, and keep a close eye on their behavior, appetite, and health.
If your sick chicken's condition does not improve or if you are unsure about how to administer subcutaneous fluids safely and correctly, I recommend seeking veterinary care promptly. A licensed veterinarian has the training and expertise to diagnose and treat your sick hen's health issue in the best possible way, thus ensuring their quick recovery.